1. a TNO, Quality of Life , PO Box 718, NL-2130 AS , Hoofddorp , The Netherlands
2. b Centre for Musculoskeletal Research , Department of Occupational and Public Health Sciences, University of Gävle , SE-80176 , Gävle , Sweden
3. d Body@Work, Research Center on Physical Activity, Work and Health , Amsterdam , The Netherlands
4. c Research Institute Move, Faculty of Human Movement Sciences , VU University , Amsterdam , 1081 BT , The Netherlands
5. e Amsterdam School of Health Professions, University of Applied Sciences (HvA), Amsterdam/Academic Medical Center , University of Amsterdam , The Netherlands